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Firdavs [7]
3 years ago
5

An item was originally priced at $6, but you used a coupon and bought it for $4.80. What percent was the coupon you used?

Mathematics
2 answers:
algol133 years ago
4 0

Answer:

The coupon was 20% off

Step-by-step explanation:

Lerok [7]3 years ago
3 0

Answer:

22.22% i think

Step-by-step explanation:

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Look at the triangle show on the right. The Pythagorean Theorem states that the sum of the squares of the legs of a right triang
Vladimir [108]

Answer:

cos^2\theta + sin^2\theta = 1

Step-by-step explanation:

Given

(\frac{b}{r})^2  + (\frac{a}{r})^2

Required

Use the expression to prove a trigonometry identity

The given expression is not complete until it is written as:

(\frac{b}{r})^2  + (\frac{a}{r})^2  = (\frac{r}{r})^2

Going by the Pythagoras theorem, we can assume the following.

  • a = Opposite
  • b = Adjacent
  • r = Hypothenuse

So, we have:

Sin\theta = \frac{a}{r}

Cos\theta = \frac{b}{r}

Having said that:

The expression can be further simplified as:

(\frac{b}{r})^2  + (\frac{a}{r})^2  = 1

Substitute values for sin and cos

(\frac{b}{r})^2  + (\frac{a}{r})^2  = 1 becomes

cos^2\theta + sin^2\theta = 1

3 0
3 years ago
Add the two expressions. 8k + 4 and 3k + 8 Enter your answer in the box.
GREYUIT [131]

Answer:

11k +12

Step-by-step explanation:

8k + 4 and 3k + 8

Combine like terms

8k + 4 + 3k + 8

8k+3k + 4+8

11k +12

4 0
3 years ago
A linear equation has more than one intercept. what can you conclude about the graph of the equation?
DanielleElmas [232]
A linear equation of the form :

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can have at the most ONE x-intercept and at the most ONE y-intercept

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5 0
2 years ago
Can someone explain to me how to find mean/median of a data set real quick?
PIT_PIT [208]
Mean is were you add up all of the numbers and how many numbers are there thats how much you divide by and median is were you line up the numbers from least to greatest then try to find the middle number <span />
3 0
3 years ago
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Simplify 7(x - 2) - 4x + 9​
DaniilM [7]
First, multiply. 7x-14-4x+9. Now, add the like terms. 3x-5.
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3 years ago
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